<!DOCTYPE html>
<html lang="en" >
    <head>
        <meta charset="utf-8" />
        <title>HTML5 时钟</title>
        <link href="css/main.css" rel="stylesheet" type="text/css" />
        <script src="http://code.jquery.com/jquery-latest.min.js"></script>
        <script src="clocks.js"></script>
      <style>
        .clocks {
          height: 500px;
          margin: 25px auto;
          position: relative;
          width: 500px;
        }
      </style>
    </head>
    <body>
        <header>
            <h2>HTML5 时钟</h2>
        </header>
        <div class="clocks">
            <canvas id="canvas" width="500" height="500"></canvas>
        </div>
    </body>
</html>